Property	Value
Hex Value	`$20`
Categories	Catalog > R Matrix > Math
Localizations	FR: `MatAléat(`

`randM(`

Overview

Returns a random matrix of rows × columns.
Max rows x columns = 400 matrix elements.

Availability: Token available everywhere.

Syntax

randM(rows,columns)

Arguments

Name	Type	Optional
rows	integer
columns	integer

Location

2nd, matrix, MATH, 6:randM(

Description

randM(M, N) generates an M by N matrix whose entries are pseudorandom integers between -9 and 9 inclusive.

seed→rand affects the output of randM(.

0→rand
    0
randM(3,3)
    [[9  -3 -9]
     [4  -2 0 ]
     [-7 8  8 ]]

If you actually cared about the bounds of the random numbers, this command would not be very useful, since it's hard to manipulate the matrix to yield uniformly spread random numbers in a different range.

Formulas

The entries of randM( are actually the outputs of successive calls to randInt(-9,9), filled in starting at the bottom right and moving left across each row from the last row to the first.

Error Conditions

ERR:INVALID DIM is thrown if the number of rows or columns of the matrix isn't an integer 1-99.

Source: parts of this page were written by the following TI|BD contributors: burr, DarkerLine, GoVegan, MrTanookiMario.

History

Calculator	OS Version	Description
TI-82	1.0	Added

Authors: Adrien Bertrand

randM(